Crawlspace encapsulation that stops the sweat.

A wet crawlspace is rotting your house from below.

Bellingham's damp ground and high water table, especially out toward Ferndale, Silver Beach, and the river flats, mean a lot of crawlspaces stay wet most of the year. A traditional vented crawlspace makes it worse, pulling humid outdoor air in during our warm months, where it hits the cool ground and condenses. The result is a crawlspace that sweats, joists that rot, mold on the framing, and a musty smell that works its way up into the house.

Encapsulation seals the whole thing off. We line the floor and run a heavy vapor barrier up the foundation walls, seal the seams and the vents, and control the remaining moisture, often with a dehumidifier sized for the space. That turns a wet, sweating crawlspace into a dry, sealed one, which protects the framing, kills the musty smell, and makes any floor insulation last. It's a bigger job than a basic vapor barrier, and for the wettest Bellingham crawlspaces it's the real fix.

What it actually costs.

Our four-step process.

1. Free assessment

   We get under the house, check the water, the framing, and the vents, and figure out what the crawlspace needs to stay dry.

2. Clear and address water

   We clear debris and old material, and handle standing water with drainage or a sump if needed.

3. Seal and line

   We line the floor and walls with a heavy vapor barrier, seal the seams, and close off the vents.

4. Control the moisture

   We set up a dehumidifier sized for the space so the crawlspace stays dry year-round.

Why hire a local crew for this work.

• Stops the crawlspace sweating and the musty smell
• Heavy vapor barrier up the walls, sealed seams and vents
• Protects the floor joists from rot and mold
• Makes floor insulation actually last
• Built for Bellingham's damp ground and high water table

Frequently asked questions.

How much does crawlspace encapsulation cost in Bellingham?

Crawlspace encapsulation in Bellingham usually runs $3,500 to $12,000. The range is wide because square footage, how much drainage the space needs, and whether it gets a dehumidifier all drive the price. It's a bigger job than a basic vapor barrier, but for the wettest crawlspaces around here it's the real fix. We quote it after we see the space.

What is the difference between a vapor barrier and full encapsulation?

A basic vapor barrier is a liner on the dirt floor to slow ground moisture. Full encapsulation seals the whole crawlspace: liner on the floor and up the walls, sealed seams, closed-off vents, and usually a dehumidifier. Encapsulation turns a vented, sweating crawlspace into a dry, sealed one. For a damp Bellingham crawlspace with rot or a musty smell, encapsulation is what actually fixes it.

Should crawlspace vents be open or sealed in Bellingham?

In our climate, sealed is usually better as part of a full encapsulation. Open vents pull humid outdoor air into the cool crawlspace during the warm months, where it condenses and makes everything wet. Once the crawlspace is lined and sealed with moisture control, closing the vents keeps that humid air out. We don't just close vents on their own, though, it's part of the whole encapsulation.

Related services.

Crawlspace Encapsulation across Whatcom County.

Every neighborhood we serve has its own story, century-old walls in the Lettered Streets, cold floors over the crawlspaces in Columbia, damp ground out by the lake. Pick your area for local notes: